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Your search keyword '"Luo, S.‐X."' showing total 2 results
Start Over Author "Luo, S.‐X." Topic corrosion
2 results on '"Luo, S.‐X."'

1. The corrosion behavior of copper in acid soil during soil acidification by simulated acid rain.

Author

Wu, Y. H., Luo, S. X., and Gou, H.

Subjects
*COPPER corrosion, *ACID soils, *ACID rain, *ACIDIFICATION, *SCANNING electron microscopy, *DISTILLED water
Abstract

The corrosion behaviors of copper in acid soil during soil acidification by simulated acid rain (SAR) were studied by means of polarization curves, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). The results indicated that the SAR increased the corrosion rate of the copper in the acidic soil. The corrosion rate of the copper increased with decreasing pH value of SAR. Corrosive characteristics of the soil obviously increased because of the leaching of the acid rain. For the leaching of the distilled water, the corrosion rate of the copper decreased. EIS of copper was a capacitive loop in the early stage of corrosion. After 60 days exposure, EIS consisted of two capacitive arcs for copper in the acidic soil leached with SAR, the control step for corrosion of copper was charge transfer process. For the distilled water, EIS consisted of a capacitive loop at higher frequency and a Warburg impedance at lower frequency, and the control step for corrosion of copper was diffusion process. [ABSTRACT FROM AUTHOR]

Published
2012
Full Text
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2. Corrosion characteristics of electroless Ni-P coating in dichloropropanol (DCP) solution.

Author

Wu, Y H, Liu, T M, and Luo, S X

Subjects
CORROSION & anti-corrosives, HEAT exchangers, EPICHLOROHYDRIN, ELECTROLESS plating, SURFACE coatings
Abstract

Corrosion of reactors or heat exchangers is a major problem in industrial applications. During the industrial production of epichlorohydrin (ECH) from dichloropropanol (DCP), there are many corrosive byproducts which can severely attack heat exchangers. It is therefore important to select suitable structural materials, which are compatible with the field environment of each particular process, to ensure the long term integrity of the reactor components. The aim of the present study is to evaluate the corrosion behaviour of the electroless Ni-P coating in the DCP solution and to gain an improved understanding of the corrosion mechanism. Type 304 stainless steel (SS) was used in the present study. A parametric study was carried out to investigate the influences of the electroless Ni-P coating thickness, immersion temperature and chloride ion concentration, on the corrosion rate and corrosion morphology of the selected materials. The corrosion rate of type 304 SS was always higher than that of the electroless Ni-P coating in DCP solution. The corrosion rate of the electroless Ni-P coating decreased with its thickness firstly and then increased. Also, the electroless Ni-P coating showed better corrosion resistance than type 304 SS in DCP solution containing chloride. 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